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Jingdao Microelectronics SMBJ40CA
Configuration
1 options
Configuration
25+
Available for RFQ
Technical data
Product details
19
specifications
Core information
- Product name
- Electronic SMBJ40CA
- Type
- Jingdao Microelectronics
- Minimum package
- 3000 圆盘
Technical parameters
- Electronic Component
- Electronic Component
- Electronic Component
- Electronic
- Electronic Component
- SMBJ40CA
- Electronic Component
- 1
- Package
- SMB
- Type
- ESD
- Electronic Component
- ESD and Surge Protection (TVS / ESD)
- Electronic Component
- 0.19g
- Electronic Component
- 1
- Cj- Capacitor
- 390pF
- Electronic Component
- BM0008740338
- Operating Temperature
- 65℃~+150℃
- Voltage
- 64.5V
- Current(Ir)
- 1uA
- Voltage(VBR)
- 49.1V
- Electronic Component
- Electronic Component
For datasheets, package documents, compatible-part guidance, or other technical resources, contact WMSIC customer service. Availability is confirmed case by case.
SMBJ40CA CR — 产品概述
一、概述
SMBJ40CA CR 为晶导微电子推出的一款TVS瞬态电压抑制二极管，采用SMB封装，专用于快速钳位和吸收瞬态过电压（如雷击浪涌、静电放电等）以保护受保护电路。器件在宽温度范围内稳定工作，适合工业级和汽车级环境的瞬态电压防护需求。
二、主要参数
- 类型：ESD / TVS 二极管
- 封装：SMB（表面贴装）
- 反向工作电压 Vrwm：40 V
- 击穿电压（典型）Vbr：49.1 V
- 钳位电压 Vc（Ipp 时）：64.5 V
- 峰值脉冲功率 Ppp：600 W（10/1000 μs 波形）
- 峰值脉冲电流 Ipp：9.3 A
- 结电容 Cj：390 pF（典型）
- 反向漏电流 Ir：1 μA（在 Vrwm 条件下）
- 工作温度范围：-65 ℃ 至 +150 ℃
三、主要特点
- 高吸收功率：10/1000 μs 波形下 Ppp 高达 600 W，适合雷击类浪涌抑制。
- 快速钳位：钳位电压低（64.5 V），能在浪涌发生瞬间有效限制电压幅值，保护后端器件。
- 宽工作温度：-65～+150 ℃，适用于恶劣环境与高温场合。
- 低漏电流与中等结电容：Ir 仅 1 μA，有利于减少静态功耗；Cj 390 pF 在高频信号线场合需评估对信号完整性的影响。
- SMB 封装，便于自动化贴装与散热。
四、典型应用
- 工业控制与电源输入保护
- 通信接口、以太网端口浪涌保护（需评估结电容对信号的影响）
- 汽车电子的瞬态抑制（在符合系统要求下）
- 家电、大型设备的输入端防雷击、突发过压保护
五、选型与布局建议
- 若用于高速信号线，应重点评估 390 pF 的结电容对带宽和信号畸变的影响，必要时选用低容型TVS。
- PCB 布局应尽量缩短保护器件到被保护器件的走线长度，使用宽铜箔回流路径以提高散热与浪涌电流承载能力。
- 对于重复冲击环境，应参考厂商的脉冲寿命与循环特性，必要时增加串联阻抗或滤波元件分担能量。
- 工作温度上限和长期可靠性需在系统最大温度下进行热仿真与实测验证。
六、环境与可靠性
器件适应-65～+150 ℃ 的环境温度，适合苛刻工业与部分汽车场景。建议在最终产品中进行浪涌测试（例如 IEC 61000-4-5）和温度循环试验以验证长期可靠性。
品牌与采购：晶导微电子，SMB 封装型号为 SMBJ40CA CR。选型时请以厂商最新数据手册为准，并留意批次与参数公差。
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